JPS6238076B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for repairing the grouser of a shoe attached to a truck chain of construction machinery, etc., which corrects the deformation of the shoe during welding, The work efficiency is improved by reverse welding.

(Prior Art) The shoe grouser must be repaired at a suitable stage of wear, and this repair is carried out by cutting the worn grouser at a suitable portion and welding a new lug of a predetermined height to it. It is done. The method currently used in the industry is to cut the worn grouser with a gas cutter, straighten the shoe deformed by the gas cut with a portal press, etc., and then apply a lug to it and then use a regular welding machine. Therefore, it is welded on one side at a time.

Therefore, when welding the other side, it is necessary to temporarily remove and reinstall, which not only reduces work efficiency, but also deformation may be restored in this process, making it impossible to restore many shoes to the same regular size and shape. It was hot too.

(Objects and Features of the Present Invention) The present invention provides an apparatus that corrects deformation during gas cutting by applying pressure, maintains this state, and performs welding by reversing the welding surface. At the same time, it facilitates accurate repair.

That is, in the present invention, the shoe and lug are put together under strong pressure before welding, so even if the shoe is deformed by heating with a gas cutter, it is corrected at this stage and welded. Since the welding machine is reversed and welded on the spot, the welding machine torch simply reciprocates in a straight line in the same place, so there is no need to adjust the position, and the pressure on the show and lug is maintained until double-sided welding is completed. It has the advantage of not being deformed during repair because it is made of plastic.

Furthermore, since a flat welding surface can be obtained by the metal fittings that are easily attached and detached at both ends of the welding part, there is also the effect that subsequent processing steps are not necessary.

(Configuration) The configuration of the device of the present invention consists of a grooved lug holding member that fits and holds the outer edge of the lug into one of a pair of opposing frames that constitute the fixed frame of the device, a mounting bar for receiving pressure, and a rotating shaft. A drive shaft connected to a rotary drive device is pivotally connected to the other opposing frame, and a hydraulic cylinder is fixed to the drive shaft, and a piston rod of the cylinder is rotatably supported. A guide bar to which a shoe support piece is attached is fixed at a position retracted from the tip, and the rotating shaft and the drive shaft are arranged between the opposing frames at an angle such that the welding surfaces of the lugs and the shoe are horizontal. The metal fittings for preventing the flow of molten metal in the welded portion are provided in a removably abutted manner on both side end surfaces of the lugs and the shoe in a state where the lugs and the shoe are installed at an angle.

(Embodiment) Reference numeral 1 denotes a machine frame of a welding machine, which includes a front frame 1a and a back frame 1b disposed at different heights on the upper part thereof, and is equipped with movable wheels 2. Reference numeral 3 denotes a sleeve fixed to the front frame, which rotatably supports the rotation shaft 4. Reference numeral 5 denotes a mounting bar which rotates together with the rotating shaft 4. Reference numeral 6 denotes a lug holding member, which is attached to the end face of the head 4a of the rotating shaft by bolts 7 in parallel with the mounting bar 5, and has a long groove 8 formed on its surface side into which the head of the lug fits. ing.

A drive shaft connected to a rotation drive device is pivotally attached to the back frame 1b, and a mounting bar 1 is attached to the end 9a of the drive shaft.
0 is fixed. 11 is a hydraulic cylinder whose base is fixed and supported by the mounting bar 10, and 12 is a piston rod.

A guide bar 13 is fixed to the piston rod at a position retracted from the tip 12a of the piston rod 12, and a shoe support piece 14 is attached to the lower part. The front end 14a of the support piece 14 is provided so as not to interfere with the movement of the welding torch.

Reference numeral 15 denotes a support/guide rod disposed between both ends of the cylinder side mounting bar 10 and the front frame side mounting bar 5, and these form a rectangular movable frame, and a guide bar is provided in the middle of the rod. 1
3 is inserted.

16 is a handle, and 16a is a speed reducer, which can be replaced with a gear motor or the like. Reference numeral 17 denotes a receiver for stopping the flow of molten metal, which is detachably attached to the machine frame via a flexible pipe 18 and a magnet 19, and is brought into contact with the outer end surfaces of the lug and shoe as shown in FIG. Ru.

21 is a head that reciprocates a predetermined distance, and 22 is a welding wire. 23 is a gas cutter which welds the worn grouser portion 31 of the shoe 30 as shown in FIG. (Several types are available) Cut at an appropriate location A that matches the gas cutter 23 to align all the show growers to the same height.

Next, the operation of the above-described apparatus of the present invention will be explained. As shown in FIG. 3, the shoe 30 whose grouter is cut by a gas cutter has its back surface 30b attached to the piston head 12a, and its rear end 30a attached to the support piece 14.
supported above.

Furthermore, the lug 32 to be welded has its outer edge 32a.
is fitted into the long groove 8 of the lug holding member 6, and the welded end surface 32b is brought into contact with the cut end surface 31a of the grouser.

After setting the position, the piston of the hydraulic cylinder is operated to apply strong pressure to the shoe 30.

Due to this pressurization, even if the shoe 30 is deformed due to thermal strain caused by gas cutting, it is corrected.

In this state, the receivers 17 are brought into contact with both sides of the welding portion 33, and the welding head 21 is operated from one end.

The welding surface 33 is horizontal due to the inclination of the frames 1a and 1b, and the molten metal does not flow down due to the receivers 17 on both sides, so that efficient welding work can be performed without waste.

After welding on one side is completed in this way, the shoe 30 is attached to the mounting bars 5, 10 by the rotational drive device.
Then turn it over and complete the welding work on the other side.

(Effects) Since the device of the present invention pressurizes the shoe and the lug with a hydraulic cylinder during the entire welding process, it is possible to correct or eliminate thermal deformation during gas cutting and welding, as well as reverse operation. This eliminates the need to adjust the position of the welding machine head, allowing for highly accurate welding and continuous work.

Also, the use of the shoe and the lugs at both ends has the effect of not wasting weld metal.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device, Fig. 2 is a plan view, Fig. 3 is a partially longitudinal side view, Fig. 4 is a perspective view of the receiver in use, and Fig. 5 shows the grocer and lug. FIG. 3 is an end view showing the relationship. 5 and 10 are mounting bars, 6 is a lug holding member, 13
is the guide bar, 30 is the show, 31 is the grocer, 3
2 is a lag.

Claims (1)

[Claims] 1 In a device that repairs a worn grouser part by welding a lug that will become a new grouser to a shoe that has been gas-cut, a groove that fits and holds the outer edge of the lug in one of a pair of opposing frames that constitute a fixed frame. The attached lug holding member is rotatably supported via a pressure-receiving mounting bar and a rotation shaft, and a drive shaft connected to a rotation drive device is pivotally attached to the other opposing frame, and the drive shaft is A hydraulic cylinder is fixedly installed, and a guide bar having a shoe support piece attached thereto is fixed to the piston rod of the cylinder at a position retracted from the tip, and the rotation shaft and the drive shaft are connected to the lug and the shoe. The metal fittings for preventing the flow of molten metal in the welding area are attached to and detached from both end surfaces of the lugs and the shoe, which are installed at an angle between the opposing frames so that the welding surface becomes horizontal, and the lugs and the shoe are installed. A corrective double-sided welding repair device for a Shugrouser, which is provided in such a manner that they can be brought into contact with each other.